Step 2: We have a formula for calculating the average slope of a function that is: A = (f(x) âf(a)) /(x â a), 'A' represents the average slope. Here (x-a) is used to represent the change in input values and f(x) â f(a) is used to denote the change in output of the function f(x).
This value is expressed in hours and represents the number of hours before the lamp is at half its original brightness. The expected life of a lamp will vary based on the lamp technology and the projector; however, most projectors offer about 2000 hours. The lamp's success rate is based on a bell curve, so that a majority of (but not all) lamps will meet the lamp life hours specified.
You probably wont get much more than opinions. Projector technology has come such a long way so quickly I doubt there are many original owners of 8 year old machines out there. I recently upgraded from a 4 year old Optoma 480P DLP, and it was time. I suppose a new bulb would have breathed new life into it, but there are MUCH better options out there now.